#include <stdio.h>

int main() {
    printf("3.14: %lf\n", 3.14);
    printf("0.5: %lf\n", 0.5);
    printf(".5: %lf\n", .5);

    printf("1E2: %lf\n", 1E2);
    printf("2e-3: %lf\n", 2e-3);
}